MGI makes a drop-in kit which includes a modified bolt with a longer/thicker firing pin, that will restore the function of the 7.62x39 uppers with the Eastern European ammo.It strikes deeper and fuller than the normal firing pin, and it requires purchasing the bolt with it, because the hole in the bolt for the firing pin is enlarged to suit the larger pin.

We originally designed this to help ignition reliability with all 7.62x39 ammo with our MGI Hydra platform, but it will do just as well in anybody's 7.62x39 AR15 that needs some help in better strike with that ammo.

I run an ad on the EE for this, or you could just call me if you're interested.

it's just damned sad you have to another 200 or so on a NEW upper to make it work.

$125 plus S&H for the bolt and improved pin for 7,62x39.

Yeah, it is a shame to have to change things right away, but some guns will work ok with the stock stuff, and some won't. FP protrusion needs to be around .039" for the Wolf and other Eastern ammo, and most AR pins only protrude about .031".When you attempt to mod things to get longer protrusion, sometimes the pin starts to pierce primers because the tip is so narrow. The only reason why the new bolt is needed is because the pin is a little thicker and won't fit thru the hole in a normal bolt.

With our kit, we make the pin longer and thicker, which solves the ignition issues and the piercing issuses too.

We wondered why nobody thought of this before, but at least we have made a solution available. We sell these often with our MGI Hydra variant with the AK magwell and 7.62x39 conversions.

Originally Posted By The_Beer_Slayer:yep, i have 2 of your kits so far and they work VERY well.

Hello - New to AR15.com (1st post) and new to AR type rifles but have been researching and admiring for some time...Will take possession of a new DPMS .308 AP4 w/ ACOG scope later next week (so long as UPS does not drop the ball...)

I'm looking to be able to shoot both .308 and the 7.62 rounds w/ my AP4 as stated above it appears due to bolt length/strike some mods are needed for "some 7.62 rounds" is this mod require for all 7.62 rounds? Are there 7.62 rounds that I can use "now"?

Thanks in advance for the support. Also is there a forum topic I need to introduce myself on? Still learning to navigate AR15.com

These gentlemen are talking about 7.62 x 39mm which is the SKS/AK round and NOT the 7.62x51mm aka 7.62 NATO you are talking about. Your rifle shouldn't have any problem firing 7.62 NATO. It will NOT, however, fire 7.62 x 39mm. Totally different chamber.

Dave, Thanks...As I re-read the thread I noticed that as well but you answered my question accurately and I appreciate that. Have a great Holdiay! I'll let you guys know how the rifle shoots next weekend.

Originally Posted By MadRich:Does anyone have a x39 upper with 14.5" or 18" barrels? What are the pros and cons of these configurations?

i was gonna offer to sell you my 7.62 upper but i see your not in a free state so im not sure you could have it. i have a 20" free float that shoots just fine. DPMS lower with a model 1 sales parts kit and upper.

Originally Posted By MadRich:Does anyone have a x39 upper with 14.5" or 18" barrels? What are the pros and cons of these configurations?

i was gonna offer to sell you my 7.62 upper but i see your not in a free state so im not sure you could have it. i have a 20" free float that shoots just fine. DPMS lower with a model 1 sales parts kit and upper.

I'm still able to obtain uppers for my lower receiver, there is no regulation against non-ffl items.Let me know what you have to offer, I'm interested.

Also, thanks for the other replies. I do know about the FP problems, what I want to know is if anybody is using 14.5" and 18" barrels and what feedback they have.

i'll post up a pic and try to figure out what shipping is. if your interested i'll toss in a couple of 10rd mags for it. they are the 10rders from brownells. they seem to work fine but have some problems. but i think there from the upper not being broke in. i dont have time to shoot it any more. 2 kids and a GF that works a rotating shift means not many weekends to shoot. i would guess its had 200 maybe 300 rds through it.

Originally Posted By mylt1:i'll post up a pic and try to figure out what shipping is. if your interested i'll toss in a couple of 10rd mags for it. they are the 10rders from brownells. they seem to work fine but have some problems. but i think there from the upper not being broke in. i dont have time to shoot it any more. 2 kids and a GF that works a rotating shift means not many weekends to shoot. i would guess its had 200 maybe 300 rds through it.

you will need to do this via email.

NO FOR SALE ADS OUTSIDE OF THE EE.

TBS is an island of Sanity in a sea of bullshit. jkstexas2001

Originally Posted By Cypher214:If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.

Originally Posted By The_Beer_Slayer:the dpms will not shoot wolf or silver bear ammo. the firing pin will not set it off.

per dpms they only use remmington ammo for testing and it that works it's fine

might keep that in mind.

THAT SUCKS!!!!!!!!!!!!$$$$$$$

filing a few thousandths of an inch off the tail of the bolt takes care of those light strikes. Easy trick. MGI makes a factory Wolf Friendly bolt assy too....I think there's other changes made, but holding the MGI and DPMS side by side, I'm hard pressed to see what those changes are.

ETA: My wife has only had her 7.62x39 AR for a few months, and it's been fed a steady diet of nothing but Wolf. The DPMS bolt assy had light strikes 2 or 3 times/100....not a single misfire since filing the tail, and it's pushing the 1000 rd mark. She's keeping the MGI bolt assy in her pistol grip as a spare.

Originally Posted By The_Beer_Slayer:the dpms will not shoot wolf or silver bear ammo. the firing pin will not set it off.

per dpms they only use remmington ammo for testing and it that works it's fine

might keep that in mind.

THAT SUCKS!!!!!!!!!!!!$$$$$$$

filing a few thousandths of an inch off the tail of the bolt takes care of those light strikes. Easy trick. MGI makes a factory Wolf Friendly bolt assy too....I think there's other changes made, but holding the MGI and DPMS side by side, I'm hard pressed to see what those changes are.

ETA: My wife has only had her 7.62x39 AR for a few months, and it's been fed a steady diet of nothing but Wolf. The DPMS bolt assy had light strikes 2 or 3 times/100....not a single misfire since filing the tail, and it's pushing the 1000 rd mark. She's keeping the MGI bolt assy in her pistol grip as a spare.

The MGI kit's main difference is the firing pin is a little larger diameter and a little longer, with a reprofiled tip.The bolt's change is primarily that the firing pin-hole is reamed out larger to accept the new improved pin. But this bolt is needed with the kit because the new pin won't fit into the hole in a normal bolt.The purpose is to strike deeper and broader, so that the deeper strike doesn't pierce the primer like the narrower normal AR15 pin can.That's all it is.

FWIW, my 7.69 upper was working fine with Win and reloads, but would misfire 3-4 out of 5 rounds when using Wolf. A few hits of the diamond file on the end of the bolt put my firing pin at about .034" protrusion and now she really runs like a champ.

Of course the battery on my Aimpoint decided to go Tango-Uniform that day I got the bolt fixed up, but of the very few aimed groups I have shot, twice it put three shots into a single hole at 50 yards. I am hoping it's a shooter....

Originally Posted By MadRich:BravoSector1,That is a sweet looking rifle.

Tango!

I've been firing S&B 123gr FMJ ($6.25 per 20) from AIM surplus (they are a 30 minute drive...bad for my wallet) and winchester out of the rifle with excellent results. Some have had issues with light primer strikes, or no ignition, with the steel/import ammo but I've fired the Barnaul 123gr and 158gr soft points (good choice for hunting) with zero issues. I don't have access to a good range so I can't give you perspective on performance of the round past 200m, but I would conclude that most of your hunting situations, and 95+% of those tactical situations, are going to be inside this envelope. This is a cheap .30cal platform in an AR-15 size/weight.

I bought a DPMS barrel, bolt and the plastic mags, assembled on some spare receiver. I immediately started getting light hits and one mag didn't feed. I machined the firing pin down for more protrusion. I bought the new CP 10 round mags. It runs like a champ now.

I have a DPMS 7.62x39 upper with a DPMS carrier and bolt. I came across some yugo 7.62x39 real cheap a while back. It works fine with my DPMS, ammo is corrosive but I give it agood cleaning with hopps 9 an use BreakFree CLP to lubricate. No problem with corrosion.

Can you ever truly get all the corrosive salts out of the action on an AR? the whole thing is gas impingement operated and it really has to be getting in all the cracks and crevices. I got about 3600 rounds of that same Yugo had for years with some SHTF old fifty buck SKS rifles to run it in ever the need arises and would not put in thru and AR.I do have a Mauser short action in that caliber and was thorough cleaning the rifle after using some in it but a few weeks after saw some rust beginning around the bolt area that I had scrubbed good.

I have a 20" Model 1 Sales 7.62 x 39 upper that works perfectly. I bought some 10 round mags from somebody I forget who, and they work fine too. Since Frankenmags can't be found without a premium price, 10 round will work fine.